chromium/third_party/blink/web_tests/svg/animations/no-attr-pattern-viewbox.svg

<svg xmlns="http://www.w3.org/2000/svg">
  <pattern id="pattern" patternUnits="userSpaceOnUse" width="100" height="100">
    <rect x="50" y="50" width="50" height="50" fill="#008000"/>
    <set attributeName="viewBox" to="50 50 50 50" fill="freeze"/>
  </pattern>
  <rect width="100" height="100" fill="#ff0000"/>
  <rect width="100" height="100" fill="url(#pattern)"/>
</svg>